package com.shopx.core.utils;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Md5Encrypt {
    private static final char[] DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e',
            'f'};

//	public static String md5(String text) {
//		MessageDigest msgDigest = null;
//		try {
//			msgDigest = MessageDigest.getInstance("MD5");
//		} catch (NoSuchAlgorithmException e) {
//			throw new IllegalStateException("System doesn't support MD5 algorithm.");
//		}
//		try {
//			msgDigest.update(text.getBytes("utf-8"));
//		} catch (UnsupportedEncodingException e) {
//			throw new IllegalStateException("System doesn't support your  EncodingException.");
//		}
//
//		byte[] bytes = msgDigest.digest();
//
//		String md5Str = new String(encodeHex(bytes));
//
//		return md5Str;
//	}

    public static String md5(String input) {
        try {
            // 获取 MD5 消息摘要实例
            MessageDigest md = MessageDigest.getInstance("MD5");

            // 将输入字符串转换为字节数组并更新摘要
            byte[] messageDigest = md.digest(input.getBytes());

            // 将字节数组转换为十六进制字符串
            StringBuilder hexString = new StringBuilder();
            for (byte b : messageDigest) {
                String hex = Integer.toHexString(0xff & b);
                if (hex.length() == 1) {
                    hexString.append('0');
                }
                hexString.append(hex);
            }
            return hexString.toString();
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("MD5算法不可用", e);
        }
    }

    public static char[] encodeHex(byte[] data) {
        int l = data.length;

        char[] out = new char[l << 1];

        int i = 0;
        for (int j = 0; i < l; i++) {
            out[(j++)] = DIGITS[((0xF0 & data[i]) >>> 4)];
            out[(j++)] = DIGITS[(0xF & data[i])];
        }

        return out;
    }

    public static void main(String[] args) {
        Long time = System.currentTimeMillis();
        System.out.println(Md5Encrypt.md5("VhU8dwfEhYySG3YTCxvp1755152518045"));
    }

}
